When you bowl on the flat patterns your accuracy, or lack thereof, is exposed. The pros bowl on very difficult patterns. Most typical house shots have about a 9:1 ratio of oil from the middle to the outside boards. This allows for miss room in both directions.
A few weeks ago I finished an agonizing month on a 43 foot pattern, with a completely flat 1:1 ratio, with 33 mls of oil. Now that we're on a 40 foot 2:1 pattern it feels like paradise!
I am fine with two handed bowlers. The only weakness I see from one guy to the next is their ability to really repeat shots. Most spray the ball all over because the THS pattern allows it. There are those who have done it for years, and have developed accuracy on difficult shots, and my hat goes off to them.
For those who want to experience what I'm referring to just get your house to put down something 3:1, or even more flat, and you'll find if your game is one that will be comparable to those of the pros.
Parker Bohn III has done it well for decades, and made a name for himself with his talent as well as his sportsmanship. He just bowls like Parker Bohn, instead of trying to do something else. We would all do well to emulate his classic style, but if you don't just learn to repeat shots. If you can repeat shots you should be able to find a way to score.